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4 August 2003 Vol. 8, No. 31 THE MATH FORUM INTERNET NEWS Early Algebra, Early Arithmetic | Hogwarts Express - Brown Java Applets for Power and Sample Size - Lenth EARLY ALGEBRA, EARLY ARITHMETIC http://www.earlyalgebra.terc.edu/ The Early Algebra Project by TERC and Tufts University examines young learners as they express general relationships among numbers and quantities through written notation, tables, and diagrams. The Publications section of their site offers abstracts and full files in PDF format. Articles include classroom episodes and examples of student work. Class Materials give a sense of the issues being discussed with grade 3 and 4 students. The materials are organized by - Title - Summary - Student's Work Discussion Group http://discuss.earlyalgebra.terc.edu/discuss/ Member Signup Form http://discuss.earlyalgebra.terc.edu/member/signup Spanish version http://www2.earlyalgebra.terc.edu/espanol.html -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- HOGWARTS EXPRESS - Judy Ann Brown http://home.ptd.net/~judyann/nctm2003/ Judy Ann Brown presented "Hogwarts Express to Improved Problem Solving and Mathematical Communication" at NCTM's 81st Annual Meeting. Measurement, proportion, probability, graphing, and more were explored through the adventures of Harry Potter and his friends. View the PowerPoint presentation: http://home.ptd.net/~judyann/Hogwarts/PowerPoint/index.htm Download the PDF files for the activities, including: - The Secret Passageway Play - Eight Digit Puzzle - House Flags - Secret Passageway - Wizard Cards Front - Wizard Cards Back - Coins - Bertie Beans - Hogwarts Express Problem Solving Set -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- JAVA APPLETS FOR POWER AND SAMPLE SIZE http://www.cs.uiowa.edu/~rlenth/Power/ Russ Lenth at The University of Iowa has developed a set of Java applets to use in a statistics course. Each applet provides a graphical interface for studying the power of one or more tests. They include sliders (convertible to number-entry fields) for varying parameters, and a simple provision for graphing one variable against another. Select one of the applets from the list, including: - CI for one proportion - Test of one proportion - Test comparing two proportions - CI for one mean - One-sample t test (or paired t) - Two-sample t test (pooled or Satterthwaite) - Balanced ANOVA (any model) -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- CHECK OUT OUR WEB SITE: The Math Forum http://mathforum.org/ Ask Dr. Math http://mathforum.org/dr.math/ Problems of the Week http://mathforum.org/pow/ Mathematics Library http://mathforum.org/library/ Math Tools http://mathforum.org/mathtools/ Teacher2Teacher http://mathforum.org/t2t/ Discussion Groups http://mathforum.org/discussions/ Join the Math Forum http://mathforum.org/join.forum.html Send comments to the Math Forum Internet Newsletter editors Donations http://deptapp.drexel.edu/ia/GOL/giftsonline1_MF.asp _o \o_ __| \ / |__ o _ o/ \o/ __|- __/ \__/o \o | o/ o/__/ /\ /| | \ \ / \ / \ /o\ / \ / \ / | / \ / \ |

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